Touch events on UIButton stop after delayed Animation is started - objective-c

Question

I am creating a UIButton inside a UIView. If I apply a transition to the UIView the myButton_TouchUpInside touch event on the UIButton stops firing. Can anyone advise? (see edit)
(I am using Xamarin here)
UIView myView = new UIView()
{
BackgroundColor = UIColor.Black,
RestorationIdentifier = identifier,
UserInteractionEnabled = true,
ClipsToBounds = true
};
UIButton myButton = new UIButton()
{
BackgroundColor = UIColor.Red,
UserInteractionEnabled = true
};
myButton.TouchUpInside += myButton_TouchUpInside;
myButton.SizeToFit();
myButton.Frame = new CGRect(0, 10, myButton.Bounds.Width, myButton.Bounds.Height);
myView.AddSubview(myButton);
View.AddSubview(myView);
Click events fire at this point. If I add a transition they stop working after the transition has occurred, I presume they have been left behind in the transition:
var myNewFrame = new CGRect(0, 50, myButton.Frame.Width, myButton.Frame.Height);
UIView.Transition(myView, 0.5, UIViewAnimationOptions.CurveEaseIn, () => { myView.Frame = myNewFrame; }, null);
I have read that the Frame of the UIButton is the key here. I checked the Frame after adding it to the UIView and then again in the completed Action in the UIView.Transition (not shown in the code above) and it's size and position are exactly the same.
edit
It isn't the transition that's causing the issue, its the animation that follows (the UIView slides then after X seconds it fades out). Directly following the transition is this code:
UIView.Animate(0.25, 10, UIViewAnimationOptions.CurveEaseInOut, () => { myView.Alpha = 0; }, () => { myView.RemoveFromSuperview(); });
If I remove this, it works.

Answer 1

OK, rather than using the inbuilt delay property I wrapped it in an async method as so:
UIView.Transition(myView, 0.5, UIViewAnimationOptions.CurveEaseIn, () => { myView.Frame = myNewFrame; }, ()=> {FadeOut(duration)});
private async FadeOut(int duration){
await Task.Delay(duration * 1000);
UIView.Animate(0.25, 0, UIViewAnimationOptions.CurveEaseInOut, () => { myView.Alpha = 0; }, () => { myView.RemoveFromSuperview(); });
}